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        var arr = [2, 0, 6, 1, 77, 0, 52, 0, 25, 7];
        for (i = 0; i < arr.length; i++) {
            console.log(arr[i]);
            if (arr[i] != 0) {

                newarr[newarr.length] = arr[i];
                //数组可以自动检测里面的长度，这次0标被占用了，下次就自动添加1了
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